Transmission Fluid Pressure Sensor / Switch Range / Performance Problem
Indicates a problem with the transmission fluid pressure sensor or switch performance.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The transmission fluid pressure sensor measures how much pressure the fluid has in the system. If it sees a reading that's too high or too low compared to what's expected, it sets off this code.
What the computer is actually seeing
The Transmission Control Module (TCM) constantly monitors the pressure readings from the sensor to determine if they're within expected parameters during operation. If it detects an out-of-range signal, it triggers the P0795 code.
What a healthy reading looks like
Expected fluid pressure is about 100-300 kPa (14.5-43.5 psi) at normal operating conditions. Check for voltage rates around 0.5V to 4.5V depending on pressure.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the transmission fluid level; correct if low or change if dirty. | Decision Point: Is the fluid level okay? (Yes: Go to step 2, No: Top up/replace the fluid before retesting.)
- 22. Check the wiring and connectors at the transmission fluid pressure sensor for signs of wear or damage. | Decision Point: Are they intact and clean? (Yes: Go to step 3, No: Repair or replace wiring/connectors.)
- 33. Use a scan tool to monitor the live data from the transmission fluid pressure sensor. | Decision Point: Are the readings within the expected range during vehicle operation? (Yes: Consider replacing the sensor, No: Investigate further issues in the transmission.)
- 44. Test the resistance and power supply to the sensor; should be around 5V reference voltage. | Decision Point: Is the voltage correct? (Yes: Go to step 5, No: Repair the power supply issue.)
- 55. If the sensor is faulty, replace it and clear the codes; perform a road test to confirm repair. | Decision Point: Does the code return? (Yes: Further diagnostics on TCM, No: Repair successful.)
Common causes
- Faulty transmission fluid pressure sensor or switch
- Wiring issues or damaged connectors
- Low or contaminated transmission fluid
- Transmission pump failure
- Faulty TCM (Transmission Control Module)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity, so you should fix it soon as it could affect shifting and driveability.
Will this code come back after I clear it?
If the issue isn't fixed, yes, it will likely return after some driving.
Why does this code pair with other codes?
Transmission issues often overlap; a fault in one area can affect others, triggering multiple codes.
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